-- @owner: opentestcase013
-- @date: 2023/7/13
-- @testpoint: ustore范围分区表，非压缩表改为压缩表

--step1:建ustore范围分区表并插入数据;expect:成功
drop table if exists t_alter_rowcompress_0093 cascade;
create table t_alter_rowcompress_0093(
  c1 integer,
  c2 char(50),
  c3 varchar(50),
  c4 integer
) with (storage_type = ustore)
partition by range(c1)(
  partition t_alter_rowcompress_0093_01
  values
    less than(1000),
    partition t_alter_rowcompress_0093_02
  values
    less than(2000),
    partition t_alter_rowcompress_0093_03
  values
    less than(3000),
    partition t_alter_rowcompress_0093_04
  values
    less than(maxvalue)
);
insert into t_alter_rowcompress_0093 values(generate_series(0, 2000),'test1','TEST2', 12365);

--step2:查看分区表信息;expect:成功
select relname, reloptions from pg_partition order by relname;

--step3:查看表表文件占用磁盘大小;expect:成功
select pg_size_pretty(pg_total_relation_size('t_alter_rowcompress_0093')) as table_size;

--step4:修改表为压缩表，checkpoint;expect:成功
alter table t_alter_rowcompress_0093 set (compresstype = 1);
checkpoint;

--step5:再次查看表文件占用磁盘大小;expect:表文件磁盘占用小于非压缩表
select pg_size_pretty(pg_total_relation_size('t_alter_rowcompress_0093')) as table_size;

--step6:查看压缩率;expect:成功
drop function if exists compress_func_findpath(character varying);
create or replace function compress_func_findpath(character varying)
returns character varying
language plpgsql
as
$body$
declare
relpath character varying;
begin
relpath = (select pg_relation_filepath(relname::regclass) from pg_class where relname = $1);
return relpath;
end;
$body$;
/
select is_compress, file_count, logic_size, physic_size, compress_ratio from pg_catalog.compress_ratio_info(compress_func_findpath('t_alter_rowcompress_0093'));

--step7:查看分区表信息;expect:成功
select relname, reloptions from pg_partition order by relname;

--step8:清理环境;expect:成功
drop function if exists compress_func_findpath(character varying);
drop table if exists t_alter_rowcompress_0093;